Drill press assembly



J1me 6 H. GOLDSCHMIDT DRILL PRESS ASSEMBLY 3 Sheets-Sheet 1 Filed NOV. 21. 1952 R m m N N E 0. a m mm M H June 5, 1956 GOLDSCHMIDT 2,748,627

DRILL PRESS ASSEMBLY Filed Nov. 21, 1952 3 Sheets-Sheet 2 BYW am QLJW ArrapA iys June 5, 1956 H, GOLDSCHMIDT 2,748,527

DRILL PRESS ASSEMBLY Filed Nov. 21. 1952 3 Sheets-Sheet 5 United States Patent 6 2,748,627 DRIL L PRESS ASSEMBLY v Hans Goldschmidt, Atherton, Calif., assignor to Magna Engineering Corporation, San Francisco, Caliii, a corporation of California Application November 21, 1952, Serial No. 321,779

1 Claim. (Cl. 77-5) I This invention relates to drill presses and in general has for its object the provision of a drill press and mounting therefor so constructed that the drill press can be made to assume a variety of positions and so arranged that a number of identical drill presses can be used simultaneously or sequentially to drill a plurality of holes in a piece of work as a unitary operation.

More specifically, the object of this invention is the provision of a drill press assembly wherein a drill press head and a power unit are mounted on opposite ends of a tubular cross-arm, said cross-arm being slidably and rotatably mounted in one of two laterally offset and right angularly disposed bores formed in a connecting joint; wherein said joint is slidably and rotatably mounted by the other of its bores on a tubular supporting member which in turn is slidably and rotatably mounted in a foot or base member; wherein said foot is provided with a pair of right angularly disposed lands selectively seatable and securable on selected portions of the upper or lower face of a supporting table; wherein means is provided for securing said cross-arm and said supporting member to said joint member in any of a plurality of positions and for securing said supporting member to said base member; and wherein a transmission is provided within said tubular cross-arms for driving said drill press head from said power unit.

A further object of this invention is the provision of a combination of a plurality or bank of drill press head assemblies of the character above described mounted on a common table.

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description where that form of the invention which has been selected for illustration in the drawings accompanying and forming a part of the present specification, is outlined in full. In said drawings, one form of the invention is shown, but it is to be understood that it is not limited to such form, since the invention as set forth in the claim may be embodied in other forms.

Referring to the drawings:

Fig. l is a side elevation of a pair of drill press head assemblies mounted on a common table for simultaneous operation on a piece of work and embodying the objects of my invention.

Fig. 2 is an end elevation of the drill press head assemblies and a common table illustrated in Fig. 1 and with portions thereof broken away to better illustrate its construction and operation.

Fig. 3 is a vertical section taken on the section line 3-3 of Fig. 2 but wherein the cross-arm and supporting member connecting joint has been shown in mid-section to better illustrate its construction.

Fig. 4 is an isometric drawing of one of the base members or feet used for fastening the tubular supporting members to the drill press table.

Fig. 5 is a horizontal section taken on the section line 5--5 of Fig. 1.

The drill press assembly illustrated in these various 2,748,627 Patented June 5, 1956 ice figures comprises a table 1 formed with parallel, finished top and bottom surface and provided with a series of identical and symmetrical sets of vertical threaded holes 2.

Selectively mountable on the upper and/ or lower face of the table 1, respectively over or under the sets of holes 2 are blocks, feet or base members 3 of general rectangular configuration. Each of the base members 3 is provided with a pair of right angularly disposed finished surfaces or lands 4 and 5 and is formed with a bore 6 extending therethrough from the land 5. As best illustrated in Fig. 4, the side of each base member opposite its face 4 is split as at 7 and extending through this split side are a pair of screws 8. It will therefore be seen that this portion of the base member serves as a clamp. Also provided in each of the finished faces or lands 4 and 5 of each base member is a set of holes 9 of the same size, and orientation as the sets of threaded holes 2, formed in the table 1. Screws can then be used to secure one or more of the base members 3 to either the upper or lower face of the table 1 in any desired position and with either of their faces or lands 4 or 5 in contact therewith,

Receivable in the bore 6 of each of the base members is a tubular column or supporting member 11, the screws 8 serving to clamp the member 11 to its base member in any desired adjusted position.

Rotatably and slidably mounted on each tubular supporting member 11 is a connecting fitting lamp or joint 12 provided with a pair of laterally ofiset, right angularly disposed bores 13 and 14, respectively, the supporting member 11 being accommodated in the bore 14 and a tubular cross-arm 15 being slidably and rotatably mounted in the bore 13. Also provided in the connecting joint 12 are a pair of right angularly disposed slots 16 and 17, respectively, intersecting the bores 14 and 13 and extending through each side of the connecting joint are screws 18 by which the supporting member 11 and cross-arm can be clamped to the joint in any desired preselected position.

Clamped to the tubular supporting member 11 by a screw 19 is a split collar 21 formed with an outwardly extending lug 22 underlying the connecting joint 12 and threaded in said lug is a micrometer adjusting screw 23 having contact with the adjacent face of the joint 12.

Mounted on one end of the tubular cross-arm 15 is a drill head unit 24 including a quill 25 and a quill manual feed 26. Secured to the opposite end of the tubular cross-arm 15 is a variable speed reducer unit 27 powered by an electric motor 28. Extending through the tubular cross-arm in operative association with the power takeoff end of the speed reducer unit 27 and with the power input end of the drill head unit 24 is a transmission unit 29v which in this instance can conveniently take the form of a belt drive. Although in so far as the present invention is concerned, the drill head unit 24, speed reducer unit 27, the motor 28 and the transmission unit 29 may all be of any well known construction, it is contemplated that the drill head unit be of such construction that its quill 25 can be either manually or power fed.

As is apparent from the above description, the base members 3 can be fastened selectively to either the upper or lower face of the table with the axes of their bores 6 either horizontally or vertically disposed as desired.

The throat of each drill press head assembly, that is, the clearance between the quill 25 and the tubular supporting member 11 is readily adjustable. When the tubular supporting member 11 is positioned horizontally as illustrated in the lower halves of Figures 1 and 2, the throat adjustment in part determines the level of the quill 25 above the table. By rotating the connecting joint 12 about the tubular supporting member 11, the level of the quill 25 can be further adjusted. Furthermore, it is to be noted that by these two adjustments it is possible to determine or fix the horizontal position of the quill 25 relative to the table surface as well as its vertical position, Also by rotating the tubular crossarm 15 within its connecting joint 12, the angularity of the quill with reference to the edges of the table can be adjusted at will.

When the tubular supporting member 11 is positioned vertically a illustrated in the upper halves of Figures 1 and 2, the horizontal, vertical and angular position of the quill 25 can be determined by the same adjustments above referred to.

Regardless of the position in which any base member 3 is fixed to the table and of the location of the connecting joint 12 on the supporting member 4, it is possible to rotate its tubular cross-arm 15 through 360 about its supporting member 11 and also to rotate its associated drill head 24 through 360 about the axis of the cross-arm 15.

Although only two drill assemblies have been illustrated it is of course contemplated that any number of such assemblies can be used simultaneously to drill variously positioned holes in a piece of work, thereby to avoid the necessity of moving the work from one jig or station to another in order to accomplish the desired end.

Basically the flexibility of a drill assembly stems from the use of one or more base members 3 provided as above described with right angularly disposed lands 4 and 5 and with fastening means by which they can be secured on either land thereof to various portions of either the upper or lower face of a common table.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

A drill press assembly comprising: a work supporting table having parallel upper and lower faces and provided with hole extending through said faces, a base block having right angularly disposed fiat surfaces, each of said surfaces having holes therein arranged to match with selected holes in said table faces and having a bore parallel to one of said surfaces and perpendicular to the other, said base block being secured to said table with one of said surfaces abutting one of said table faces with said holes in matched relation, and means cooperating with said matched holes removably securing said block to said table whereby said block may be selectively secured to either the upper or lower face of said table with said bore either parallel or perpendicular to said table faces, a column mounted in and extending from said bore, and a drill head mounted on said column for adjustment thercalong, angularly therearound, and radially thereto and for angular adjustment about an axis generally transverse to said column, said drill head having a rotary spindle rotatable on an axis perpendicular to said transverse axis.

References Cited in the file of this patent UNITED STATES PATENTS 547,215 Jaimison et al Oct. 1, 1895 690,669 Steckenreiter Jan. 7, 1902 1,620,343 Hacker Mar. 8, 1927 

